+/*
+ * Use a symbol of the previous ABI to detect if liblttng-ust-tracepoint.so.0
+ * is loaded in the current process.
+ */
+#define LTTNG_UST_TRACEPOINT_SONAME_0_SYM "tracepoint_unregister_lib"
+
+static
+void lttng_ust_tracepoint_check_soname_0(void)
+{
+ if (!dlsym(RTLD_DEFAULT, LTTNG_UST_TRACEPOINT_SONAME_0_SYM))
+ return;
+
+ CRIT("Incompatible library ABIs detected within the same process. "
+ "The process is likely linked against different major soname of LTTng-UST which is unsupported. "
+ "The detection was triggered by lookup of ABI 0 symbol \"%s\" in the Global Symbol Table\n",
+ LTTNG_UST_TRACEPOINT_SONAME_0_SYM);
+}
+
+/*
+ * Expose a canary symbol of the previous ABI to ensure we catch uses of a
+ * liblttng-ust-tracepoint.so.0 dlopen'd after .so.1 has been loaded. Use a
+ * different symbol than the detection code to ensure we don't detect ourself.
+ */
+int tracepoint_register_lib(void *arg0 __attribute__((unused)), int arg1 __attribute__((unused)));
+int tracepoint_register_lib(void *arg0 __attribute__((unused)), int arg1 __attribute__((unused)))
+{
+ CRIT("Incompatible library ABIs detected within the same process. "
+ "The process is likely linked against different major soname of LTTng-UST which is unsupported. "
+ "The detection was triggered by canary symbol \"%s\"\n", __func__);
+
+ return -1;
+}
+